Vehicle spring



Jul 14, 1925..

A. C. MILLS VEHICLE SPRING Filed Oct. 25 1923 wnmmm;

Patented July 14, 1925.

UNITED STATES ABNER C. MILLS, OF WILLOW GROVE, PENNSYLVANIA.

VEHICLE SPRING.

Application filed October 25, 1923. Serial No. 670,640.

To all whom it may concem: I

Be it known that I, ABNER C. MILLS, a citizen of the United States, residing at lVillow Grove, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Vehicle Springs, of which the following is a specification.

My invention relates to vehicle springs and more particularly to spring-engaging devices adapted to engage an emergency spring before the main spring is stressed to its load-supporting limit.

The objects are to provide means which will be operative to take the extra load or shock from the main spring when stressed to a point where it is liable to break, and which will be inoperative when the main spring is under ordinary strains.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawing in which Figure 1 is a fragmentary side view partly in section of a vehicle having my invention applied thereto,

Figure 2 is a section on line 2-2 of Figure 1 Fighre 3 a topplan view of the springengaging device constructed in accordance with my invention, and

Figure 4 a section on line 44 of Figure 3.

Referring to the drawings, 1 indicates the chassis of a vehicle, 2 the main spring connccted to the chassis at its-ends 3. A bowed-emergency spring 4 rests on the main spring and is secured thereto by U-bolts 5 which secure the main spring to the axle 6 in the usual manner. The ends 7 of the emergency spring 4 extend toward the chassis and are adapted to engage anti-friction spring-engaging devices 8, secured to the chassis, when main spring 2 is stressed. beyond a certain limit.

These spring-engaging devices are disposed directly above the ends 7 of the emer-' gency spring and are spaced therefrom a suflicient distance to allow the main spring to take the load by itself when not subjected to excessive strain. Theoonstruction of each of these devices 8 is indentical and but one will be described.

The spring-engaging device includes a bracket 9 composed of a pad 10 engaging the bottom of the chassis and a pad 11 engaging the side of the chassis. These pads are secured to the chassis by bolts. Each pad 10 and 11 is provided with depending supports 12 and 13 respectively for receiving a journal bolt 14. The supports are suitably reinforced by ribs for strength and rigidity. An anti-friction roller 15 is mounted on bolt 14 between supports 12 and 13 and is composed of a sleeve 16 fixed to bolt 14; rollers 17 mounted to roll on the sleeve; side plates 18' for keeping the rollers in position, and a ring 19 rotatable on the rollers 17.

In use, when the'vehicle is loaded or receives a shock from thero-ad so that its main spring is subjected to ,more than ordinary strain, the ends 7 of the emergency spring will engage the roller 15 As the pressure upon the emergency spring increases, its ends 7 will be forced farther apart and the anti-friction rollers 15 which they engage will allow them to move practically unobstructed, thus smoothly absorbing shocks or taking the extra load off the main spring and thereby preventing it from breaking.

While I have described my invention as taking a particular form, it will be understood that the various parts may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Lettors Patent is I 1. In combination with a main spring con- .nected to a chassis and a bowed emergency spring secured to the main springwi-th its ends extending toward the chassis; a bracket disposed above each end of the emergency spring, having a pad secured to the bottom of the chassis, and a pad secured to the side of the chassis, each of the padsbeing provided with a dependin roller support; a bolt passing through t e supports, and a roller mounted on the bolt between the supports and adapted to be engaged by the end of the emergency spring w en the main spring is subjected to strains beyond a certain limit. 7

2. In combination with a main spring connected to a chassis and a bowed emergency spring secured to the main spring with its ends extending toward the chassis; a bracket emergency spring when the main spring is disposed above each end of the emergency subjected to strains beyond a. certain limit. spring, having a pad secured to the bottom In testimony whereof I have signed my of the chassis and a pad secured to the side name to this specification in the presence of 5 of the chassis, (fach 3f the pads being protwo subscribing witnesses.

vided wit a y epen ing ro ler support; a. bolt passing through the supports; a sleeve ABNER on the bolt; rollers mounted to roll about Witnesses the sleeve, and a ring rotatable on the rollers ANNA M. QUIN adapted to beengaged by the end of the ELIZABETH GARBE. 

